9. With the engine at idle, slowly extend the boom 2-3 feet (.6-1 m). As the jib clears the
storage brackets, the jib will swing out approximately 45°.
Booming down too quickly can result in damage to jib.
10. With the engine at idle, slowly boom down to minimum boom angle while another
operator uses the guide rope to control the speed of the jib rotation. The jib will swing
around until the left side mounting holes line up.
11. If cable from main boom is to be used on jib, remove cable from boom head load
sheaves and swing over top left jib cord before pinning jib to boom. Install the left
upper and lower jib mounting pins.
12. Remove the guide rope.
13. Disconnect the anti two-block plug from the jib anti two-block socket and connect it to
the socket on the boom head. Move the dummy plug from the boom head socket to
the anti two-block socket on the jib.
14. Reeve the hoist line over the jib sheave.
15. Test the anti two-block system by lifting the anti two-block weight. The light and
audible alarms should be actuated in the cab and the boom down, boom extend, and
winch up controls should disconnect.
CHANGING THE OFFSET OF JIB
Assembly
62 P/N 12261-319 REVISED: August 2012
Courtesy of Crane.Market
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